is a minimal boilerplate to mix vvvv patches
Get vvvv, you will havvvve fun! Go in the deck folder, right click on root.v4p and choose Open as root in the contextual menu. You will see a list of patches you can switch by clicking on the buttons, like in the screenshot below.
Please note that there is a preview render on top, while the actual render is elsewhere, you probably want to open it in full screen on another display. Patches must be saved in the modules folder and added manually to the list. All patches must have the same identical outputs.